Identifying Part Numbers from Old Tractors

Finding the correct part numbers for old tractors requires a systematic approach to ensure compatibility and avoid costly mistakes.

Here’s how to identify the right part numbers...

• Locate Serial and Part Numbers: Check the original part itself for any number stampings, castings, or tags. These may include the part number or codes to cross-reference. Tractor serial numbers (on a metal plate, usually on the frame or near the steering) and engine serials (often stamped on the block) also help narrow down exact fitment.
• Use Parts Manuals and Catalogs: Original or reproduction tractor parts manuals are the most reliable way to find authentic part numbers. Manufacturers and specialist suppliers like John Deere and Massey Ferguson provide illustrated parts diagrams online, built by serial/model year for precise identification.
• Understand Maker-Specific Numbering: Older brands may use unique practices, such as prefixes or suffixes indicating series, part type, or era (e.g., John Deere numbers with R or T for two-cylinder models). Cross-referencing casting codes, model lists, and specific digit patterns helps match obscure numbers to published part IDs.
• Get Help From Experts: If the numbers are missing or illegible, compare the part’s shape against diagrams or photos in parts catalogs, restoration forums, or with the help of mechanics experienced in vintage equipment. Online communities and tractor dealers often guide users through the identification process, especially when part numbers are not visible.

By combining these steps, even tough-to-identify parts from antique tractors can usually be traced to the correct part number for reliable replacement or restoration.

If you need any further help or have any questions about service, tractors, implements, or anything else equipment-related, please contact your dealer, local mechanic, or call us at 602-704-3505.  Please ask about our current new and used tractor supply.

If you are looking for old, vintage, classic, or new tractor parts, send us a part request. 

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